A Sea Without Fish: Life In The Ordovician Sea Of The Cincinnati Region (life Of The Past)
by Richard Arnold Davis /
2009 / English / PDF
33 MB Download
The region around Cincinnati, Ohio, is known throughout the world
for the abundant and beautiful fossils found in limestones and
shales that were deposited as sediments on the sea floor during
the Ordovician Period, about 450 million years ago—some 250
million years before the dinosaurs lived. In Ordovician time, the
shallow sea that covered much of what is now the North American
continent teemed with marine life. The Cincinnati area has
yielded some of the world's most abundant and best-preserved
fossils of invertebrate animals such as trilobites, bryozoans,
brachiopods, molluscs, echinoderms, and graptolites. So famous
are the Ordovician fossils and rocks of the Cincinnati region
that geologists use the term "Cincinnatian" for strata of the
same age all over North America. This book synthesizes more than
150 years of research on this fossil treasure-trove, describing
and illustrating the fossils, the life habits of the animals
represented, their communities, and living relatives, as well as
the nature of the rock strata in which they are found and the
environmental conditions of the ancient sea.
The region around Cincinnati, Ohio, is known throughout the world
for the abundant and beautiful fossils found in limestones and
shales that were deposited as sediments on the sea floor during
the Ordovician Period, about 450 million years ago—some 250
million years before the dinosaurs lived. In Ordovician time, the
shallow sea that covered much of what is now the North American
continent teemed with marine life. The Cincinnati area has
yielded some of the world's most abundant and best-preserved
fossils of invertebrate animals such as trilobites, bryozoans,
brachiopods, molluscs, echinoderms, and graptolites. So famous
are the Ordovician fossils and rocks of the Cincinnati region
that geologists use the term "Cincinnatian" for strata of the
same age all over North America. This book synthesizes more than
150 years of research on this fossil treasure-trove, describing
and illustrating the fossils, the life habits of the animals
represented, their communities, and living relatives, as well as
the nature of the rock strata in which they are found and the
environmental conditions of the ancient sea.